McCauley B-20429, Torsion Damper Spring - Tempest PMA
Tempest AGB-20429-PMA
The Tempest AGB-20429 (McCauley OEM B-20429) is an FAA-PMA replacement torsion damper spring for McCauley applications.
- Helps reduce hunting tendencies by adding the intended damping behavior to the governor mechanism where specified.
- Supports consistent governing response by restoring correct spring force when the original spring has fatigued, corroded, or deformed.
- Common overhaul replacement because torsion springs are fatigue sensitive and can lose rate over time in high-cycle service.
In aviation governor service, damping components are often the difference between a governor that feels stable and one that is sluggish or inconsistent, especially across temperature changes.
Installation notes
Refer to the applicable governor and engine maintenance manual for full installation procedures, torque values, and inspection requirements.
- Confirm correct orientation and preload per the approved overhaul data to avoid improper damping behavior.
- Inspect related pins, bushings, and contact surfaces for wear that can mimic a weak or incorrect damper spring condition.
Applications and fitment
Used on McCauley governor assemblies where OEM B-20429 is specified. Confirm compatibility by matching the OEM part number and reviewing governor model and serial number applicability in approved maintenance data.
Tempest AGB-20429 is the direct replacement for OEM B-20429. Match the OEM part number and confirm applicability by governor model and serial number in the approved maintenance data.
Pilot John International offers Tempest PMA propeller governor parts for propeller overhaul shops, FBOs, and aviation technicians to support aircraft maintenance and ground support.
| General Information | |
|---|---|
| Part # | AGB-20429 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.01 lbs. |
| Product Dimensions | 1 x 0.3 x 0.1 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part |
| OEM P/N | B-20429 |
| System | McCauley propeller governor, damping mechanism |
| Tempest P/N | AGB-20429 |
| Type | Spring, torsion damper |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Cessna | 310 |
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QUESTIONS & ANSWERS
Tempest AGB-20429 is a direct FAA-PMA replacement for McCauley P/N B-20429. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGB-20429 Torsion Damper Spring is designed for use in aircraft equipped with McCauley model DCFUS290D6 propeller governors. Matching replacement parts to the correct governor model is essential to ensure proper fit, function, and reliable operation.
The Tempest AGB-20429 Torsion Damper Spring absorbs torsional vibrations within the governor linkage. Damping improves stability and reduces long-term wear.
PJi offers the Tempest AGB-20429 as an FAA-PMA-approved replacement for the McCauley B-20429 torsion damper spring. View our full selection of Tempest propeller governor parts to find the correct component for your application.
For a deeper look at how propeller governors work, why proper maintenance matters, and how to identify compatible replacement components, refer to our Ultimate Guide to Aircraft Propeller Governor Maintenance.
